Add MAA MPP Model to docs/theory

docs/Theory/EF_MPP_Model.md

@@ -38,7 +38,7 @@ and $eps$ is:
 eps = 2\sqrt{\frac{\phi}{\pi}}
 \]
 
-The [Add_MPP_EF_Layer](https://jakep72.github.io/acoustipy/AcousticTMM/#src.acoustipy.TMM.AcousticTMM.Add_MPP_EF_Layer) method then converts The modified dynamic mass density and bulk modulus to the characteristic impedence $(Z_{c})$ and wavenumber $(k_{c})$ for use in the layer transfer matrix.
+The [Add_MPP_EF_Layer](https://jakep72.github.io/acoustipy/AcousticTMM/#src.acoustipy.TMM.AcousticTMM.Add_MPP_EF_Layer) method then converts the modified dynamic mass density and bulk modulus to the characteristic impedence $(Z_{c})$ and wavenumber $(k_{c})$ for use in the layer transfer matrix.
 
 \[
 Z_{c} = \sqrt{\tilde{\rho}\widetilde{K}}

docs/Theory/MAA_MPP_Model.md

@@ -0,0 +1,77 @@
+# MAA MPP Model
+
+The Maa microperforate model determines the characteristic impedence $(Z_{c})$ of the layer based on the perforate diameter $(d)$, center-to-center distance $(b)$, and thickness $(t)$.
+
+Unlike other material models, the Maa MPP model does not calculate a characteristic wavenumber $(k_{c})$.  Instead, a separate transfer matrix is used.
+
+# Determination of Characteristic Impedence
+
+\[
+Z_{c} = r+j\omega m
+\]
+
+where $r$ is:
+
+\[
+r = \frac{32\eta t}{\phi d^2} r_{1}
+\]
+
+\[
+r_{1} = \sqrt{1+\frac{x^2}{32}}+\frac{\sqrt{2}}{32} x \frac{d}{t}
+\]
+
+$m$ is:
+
+\[
+m = \frac{\rho_{0}t}{\phi} m_{1}
+\]
+
+\[
+m_{1} = 1+\frac{1}{\sqrt{1+\frac{x^2}{2}}}+\frac{0.85d}{t}
+\]
+
+and 
+
+\[
+x = \frac{d}{2}\sqrt{\frac{\omega\rho_{0}}{\eta}}
+\]
+
+\[
+\phi = \frac{\pi}{4}\Bigg(\frac{d}{b}\Bigg)^2
+\]
+
+The characteristic impedence $(Z_{c})$ is then used directly in the layer transfer matrix via the [Add_MAA_MPP_Layer](https://jakep72.github.io/acoustipy/AcousticTMM/#src.acoustipy.TMM.AcousticTMM.Add_MAA_MPP_Layer) method.
+
+
+## Model Parameters:
+
+##### Using the following nomenclature --- Symbol = [Units] (name)
+
+\[
+d = \Bigg[m\Bigg]\tag{perforate diameter}
+\]
+
+\[
+b = \Bigg[m\Bigg]\tag{center-to-center distance}
+\]
+
+\[
+t = \Bigg[m\Bigg]\tag{layer thickness}
+\]
+
+
+## Defining Other Symbols:
+
+##### Using the following nomenclature --- Symbol = [Units] (name)
+
+\[
+\rho_{0} = \Bigg[\frac{kg}{m^3}\Bigg]\tag{air density}
+\]
+
+\[
+\eta = \Bigg[Pa*s\Bigg]\tag{viscosity of air}
+\]
+
+\[
+\omega = \Bigg[\frac{radians}{s}\Bigg]\tag{angular frequency}
+\]

docs/Theory/TMM_Theory_General.md

@@ -1,17 +1,3 @@
-### ***The Theory section is under active development***
-- Porous Material Models
-    - [x] [DB Model](https://jakep72.github.io/acoustipy/Theory/DB_Model/)
-    - [x] [DBM Model](https://jakep72.github.io/acoustipy/Theory/DBM_Model/)
-    - [x] [JCA Model](https://jakep72.github.io/acoustipy/Theory/JCA_Model/)
-    - [x] [JCAL Model](https://jakep72.github.io/acoustipy/Theory/JCAL_Model/)
-    - [x] [JCAPL Model](https://jakep72.github.io/acoustipy/Theory/JCAPL_Model/)
-    - [x] [Horoshenkov Model](https://jakep72.github.io/acoustipy/Theory/Horoshenkov_Model/)
-    - [x] [Biot-Limp Model](https://jakep72.github.io/acoustipy/Theory/Biot_Limp_Model/)
-    - [x] [Biot-Rigid Model](https://jakep72.github.io/acoustipy/Theory/Biot_Rigid_Model/)
-    - [x] [Resistive Screen Model](https://jakep72.github.io/acoustipy/Theory/Resistive_Screen_Model/)
-- Microperforate Models
-    - [ ] [MAA Model](https://jakep72.github.io/acoustipy/Theory/MAA_MPP_Model/)
-    - [ ] [EF Model](https://jakep72.github.io/acoustipy/Theory/EF_MPP_Model/)
 ### All models and methods described in the Theory section align with the code implementation.
 
 ### For each material model, an array of values corresponding to the complex characteristic impedance $(Z_{c})$ and wavenumber $(k_{c})$ are generated and used to calculate that layer's transfer matrix.

mkdocs.yml

@@ -54,7 +54,7 @@ nav:
       - Inverse Method: Examples/Inverse.md
       - Indirect Method: Examples/Indirect.md
       - Hybrid Method: Examples/Hybrid.md
-  - Theory -- under active development:
+  - Theory:
     - AcousticTMM:
       - Overview: Theory/TMM_Theory_General.md
       - Porous Material Models: